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EP1524105B1 - Matériau léger et son procédé de fabrication - Google Patents

Matériau léger et son procédé de fabrication Download PDF

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Publication number
EP1524105B1
EP1524105B1 EP04024769A EP04024769A EP1524105B1 EP 1524105 B1 EP1524105 B1 EP 1524105B1 EP 04024769 A EP04024769 A EP 04024769A EP 04024769 A EP04024769 A EP 04024769A EP 1524105 B1 EP1524105 B1 EP 1524105B1
Authority
EP
European Patent Office
Prior art keywords
resin
layer
honeycomb
composite material
lightweight composite
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP04024769A
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German (de)
English (en)
Other versions
EP1524105A3 (fr
EP1524105A2 (fr
Inventor
Oliver Bottler
Patrick Freres
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Euro Composites SA
Original Assignee
Euro Composites SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE10358295A external-priority patent/DE10358295B4/de
Application filed by Euro Composites SA filed Critical Euro Composites SA
Publication of EP1524105A2 publication Critical patent/EP1524105A2/fr
Publication of EP1524105A3 publication Critical patent/EP1524105A3/fr
Application granted granted Critical
Publication of EP1524105B1 publication Critical patent/EP1524105B1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties

Definitions

  • the invention relates to a lightweight composite material according to the preamble of claim 1. Furthermore, the invention relates to a method according to the preamble of claim 27 for producing such a lightweight composite material.
  • Flat lightweight composite materials of the type mentioned are known and come in a variety of technical applications, such as aerospace, shipbuilding or motor vehicle construction, used.
  • a carrier or core material in the known composite materials also called composites or composite material, preferably flat, preformed or deformable lightweight materials, such as foam, from low density wood or materials with honeycomb structures used.
  • a cover layer on at least one of the surfaces of the carrier material.
  • cover layers for example, films or fiber composite material layers are used, which are later attached to the flat side of the carrier material, for example by gluing.
  • a disadvantage of the known lightweight composite materials and the process for their preparation is that in the production of the known composite materials, the formation of fiber composites, which consist of embedded in resins fiber material, at most on the support material is very limited possible if the carrier material is an open Foam or honeycomb structure is used.
  • the fiber composites must first be manufactured separately from the carrier material, for example in the form of so-called prepregs, i. resin-preimpregnated fabrics or scrims, and may be joined to the substrate in a further process step.
  • prepregs i. resin-preimpregnated fabrics or scrims
  • a composite material which is formed from a honeycomb-like carrier material, applied to the flat side of the carrier material, held by an adhesive layer on the carrier material, resin-impermeable separating layer and a cured on the release layer cover layer, which consists of a embedded in a resin fleece or fiber material.
  • an adhesive film is first applied to the release layer.
  • the separating layer provided with the adhesive film is glued to the flat side of the carrier material with the aid of the adhesive layer so that the honeycomb open to the flat side of the carrier material are as completely closed as possible.
  • the nonwoven or fibrous material is placed on the release liner, the entire assembly is placed in a mold, and the nonwoven or fibrous material is resin impregnated by the RTM process, the Separating layer prevents penetration of the resin into the honeycomb structure of the carrier material.
  • the EP 1 281 505 A1 discloses a composite material and a method for its production.
  • two adhesive layers serving as release layers are applied to a base material, namely a first adhesive layer of high viscosity resin and an impermeable second adhesive layer applied thereto.
  • a fleece or fiber material is placed on these two adhesive layers.
  • the assembly of backing material, adhesive layers, and flux or fiber material undergoes a first heat treatment in a closed mold to react the resins of the adhesive layers, the first adhesive layer being firmly bonded to the backing material and the second adhesive layer, while the second adhesive layer firmly connected to the underside of the nonwoven or fibrous material.
  • the mold is evacuated and the nonwoven or fiber material impregnated with a resin which is injected under a pressure of 2 to 3 bar in the mold.
  • a process is described wherein a cover layer of resin-embedded nonwoven or fibrous material is applied to a honeycomb substrate using the RTM process to produce a composite material.
  • a first layer of a cured film is applied to the substrate and cured within the mold.
  • an intermediate layer in the form of a prepreg material is applied to the cured release layer, which is also cured in the mold.
  • a preform made of fiber material is placed on this intermediate layer, which is impregnated in the mold with resin by means of the RTM process.
  • the DE 36 25 534 A1 discloses a flame retardant building board in sandwich construction, which has a honeycomb-like support material, on its flat sides in each case an intermediate layer of fiber material and an outer layer, which is likewise made of a fiber material, are applied, wherein the intermediate layer with an epoxy resin-based resin and the outer layer with a Phenol resin-based resin are impregnated. Between the intermediate layer and the outer layer, a thin aluminum foil is further applied, which should serve as a thermal insulation to the intermediate layer in case of fire.
  • the EP 1 162 058 A1 discloses a two-layer lightweight composite material consisting of a core material and a resin-impregnated cover layer disposed thereon, the core material having flow channels for distributing the resin.
  • the cover layer is applied directly to the core material so that the resin must completely penetrate the cover layer to reach the region of the flow channels. Although the resin is distributed on the core material through the flow channels, there is no uniform distribution of the resin over the cover layer.
  • the invention solves the problem by a lightweight composite material having the features of claim 1.
  • the invention is based on an essential idea, through the use of a resin-impermeable separating layer which is provided between the carrier material and the cover layer, methods, in particular industrially applied processing methods, with which a cover layer of a resin-impregnated fiber or honeycomb material directly on the support - or core material can be produced to make open porous carrier materials, such as open honeycomb structures or open-cell foam usable.
  • the liquid resin can not penetrate into the carrier material during the production of the cover layer and at least partially fills it. Rather, the resin in which the fiber or honeycomb material is embedded, to form the cover layer directly on the support material cure, so that too Vietnameseplane surface courses of the carrier material can be provided in a simple and elegant way with a formed as a composite cover layer. It is also possible that the per se impermeable release material has holes through which the resin can penetrate at selected locations for anchoring in the carrier material.
  • flow channels and / or openings are provided according to a further essential idea of the invention in the carrier material and / or in the separating layer and / or in the fiber or honeycomb material of the cover layer to be formed.
  • the resin can be selectively distributed by the flow channels and / or openings, whereby the flow behavior of the resin is improved at the top and bottom of the fiber or nonwoven material.
  • the openings are filled with resin, so that after hardening of the resin, additional resin channels, which possibly protrude into the core material, are formed, by which the composite material is given additional stability and rigidity.
  • the flow channels and / or openings are preferably arranged relative to one another such that a predetermined flow behavior or a predefined flow front of the liquid resin in the fiber or honeycomb material and / or in the carrier material can be set.
  • a fibrous or honeycomb material in which the flow channels are formed on at least one of the flat sides of the fibrous or honeycomb material, or to use a separating layer at whose flat side facing the fibrous or honeycomb material Fliesskanäle are formed. This ensures that the liquid resin particularly evenly distributed between the abutting flat sides of the release layer and the fiber or honeycomb material and the resin forms a particularly good bond between the fiber or honeycomb material and the release layer after curing.
  • the flow channels are preferably embossed into the relevant flat side.
  • the flow channels are formed on the relevant flat side of the honeycomb material.
  • the flow channels preferably run in a honeycomb-like structure, whereby the liquid resin can be specifically diverted.
  • the honeycomb-like structure may also run irregularly in accordance with a predetermined pattern, so that a defined flow behavior of the liquid resin can be predetermined in a targeted manner.
  • openings defined in the surface of the carrier material and / or the surface of the separating layer preferably in the form of perforations, which run normal to the flat side of the carrier material or of the separating layer. This allows the resin to penetrate through the openings in the carrier material, whereby the flow behavior of the resin is improved at the top and bottom of the fiber or honeycomb material. Furthermore, the openings fill with resin, so that after hardening of the resin in addition resin channels are formed by the core material, which give the finished composite material increased stability and rigidity.
  • a flat carrier material the two flat sides of which are provided as surfaces in the manner according to the invention with a separating layer and a covering layer. This ensures that the carrier material is closed by both flat sides and is formed as a sandwich material.
  • the separating layer is preferably formed from a polymer film which is applied to the surface of the carrier material.
  • a film is particularly suitable a film of a thermoplastic material, since it is easy to work with and can be adapted to the surface course with relatively little effort.
  • a release layer in a particularly preferred embodiment of the composite material according to the invention, it is proposed to use as a release layer a woven fabric, a scrim, a braid, a knitted fabric, a knitted fabric or a fleece.
  • the thickness of the separating layer is in this case dimensioned such that the liquid resin optionally penetrates into the separating layer during the production of the covering layer, but does not pass through the latter to the carrier material.
  • the release layer is through the resin with the fiber material of the cover layer connected as soon as the resin has hardened. This results in a particularly good connection of the cover layer with the release layer.
  • the woven fabric, scrim, braid, knitted fabric or nonwoven fabric is preferably made of a thermoplastic material or a fiber material, wherein the plastic or fiber material preferably has at least approximately the same physical properties with regard to the modulus of elasticity or the temperature-dependent expansion coefficients as the fiber material of the cover layer.
  • the release layer of a material which has completely or partially dissolved after the curing of the resin.
  • both the release layer in the form of a film and the separating layer of plastics in the form of a woven fabric, scrim, braid, knitted fabric, knitted fabric or nonwoven are all polymers to be processed into films or fibers.
  • Particularly preferred polymers are polyesters, polyethylene, polyvinyl chloride, polypropylene, polyamide, polycarbonate, polyacrylic, polyacrylonitrile, polytetrafluoroethylene or mixtures of these plastics.
  • a foam layer or a foam sheet serves as a release layer, a foam layer or a foam sheet.
  • the foam layer or foam sheet can evenly cling to the surface of the substrate.
  • the foam layer or foam film leads to increased thermal insulation in the composite material according to the invention.
  • the foam material of the foam layer or the foam film can be closed-pored or open-pored.
  • the foam layer or the foam film can be made of all materials to be processed into foams.
  • it is made of polyurethane, linear or crosslinked polyvinyl chloride, polyetherimide, polymethacrylimide, a phenolic resin, an epoxy resin or a mixture of at least two of the aforementioned plastics.
  • a metal foil preferably of aluminum, steel, bronze or copper
  • Even a thin lead foil is suitable as a release layer.
  • the use of a metal foil as a separating layer ensures that the composite material according to the invention has a shielding effect, for example against electromagnetic waves, so that the separating layer fulfills a dual function, namely its use according to the invention, penetration of liquid resin into which the carrier material is prevented, and on the other hand its effect as a shield.
  • the release layer In order to secure the release layer to the carrier material, it is proposed to provide a first adhesive layer between the release layer and the carrier material.
  • the adhesive layer is applied for example in the form of an adhesive film on the carrier material.
  • the release layer for example, a release fabric, placed on the adhesive film and glued to it.
  • an adhesive layer between the release layer and the cover layer.
  • this adhesive layer the fiber material with which the cover layer is to be formed can be kept in a defined position prior to the application of the liquid resin to the release layer.
  • this adhesive layer serves as additional bonding possibility between release layer and cover layer.
  • the adhesive layer or layers are preferably formed as an adhesive film based on an epoxy resin, a polyester resin, a phenol resin, a vinyl ester resin, an acrylic resin, an acrylate adhesive or a silane.
  • adhesive films which are formed on the basis of a mixture of at least two of the aforementioned resins.
  • the foil on the front side and, if appropriate, back side must be provided in advance with an adhesive film.
  • the fibrous material for the cover layer is preferably a woven fabric, a scrim, a braid, a knitted fabric, a knit fabric, a nonwoven or a hybrid material, since this type of fiber material can be uniformly soaked by the liquid resin and after curing of the resin of the cover layer, depending on used system combination, a high mechanical strength and at the same time gives excellent elastic properties.
  • materials which comprise glass fibers, carbon fibers, aramid fibers, ceramic fibers, metal fibers and / or metal wires are preferably used for these types of fiber material.
  • materials based on thermoplastics or elastomers are also used for these types of fiber material.
  • the resin material in which the fibrous material is embedded it is preferable to use an epoxy resin, a polyester resin, a phenol resin, a vinyl ester resin, an acrylic resin, a silane or a mixture of at least two of these resins because these resins are easy to process and cure relatively quickly.
  • the support material has a preferably uniform, possibly also resin-impregnated honeycomb structure. Due to the uniform honeycomb structure, a particularly high mechanical strength is achieved, in particular in the longitudinal direction of the individual honeycombs with a low specific weight.
  • the honeycombs preferably run with their longitudinal directions approximately perpendicular to the release and cover layer.
  • the honeycomb structure may be formed of metal, preferably of aluminum.
  • honeycomb structures of paper or cardboard are proposed as a carrier material. These honeycomb structures formed of paper or paperboard can additionally be reinforced with fibers.
  • honeycomb structures made of paper or cardboard are particularly preferred the composite material according to the invention is used, in which the paper or cardboard material is supplemented with aramid fibers, in particular Nomex® fibers or Kevlar® fibers, polyester fibers, PVC fibers, polyacrylic fibers, polypropylene fibers or a mixture of at least two of these types of fibers.
  • the honeycomb structures may optionally be additionally impregnated with resin.
  • the honeycomb structure may be made of a plastic material.
  • a filling material for example microballoons, to be filled in the honeycomb structure.
  • foam material instead of a honeycomb structure as the carrier material.
  • the use of foam material as a carrier material is particularly advantageous if the composite material should have a high thermal insulation effect.
  • the foam material here is preferably made of polyurethane, linear or crosslinked polyvinyl chloride, polyetherimide, polymethacrylimide, phenolic resin, epoxy resin or mixtures thereof.
  • foamed metal foam materials it is also conceivable to use foamed metal foam materials.
  • a lightweight composite material according to the invention is proposed, in which the carrier material is made of balsa wood.
  • the invention relates to a method for producing a lightweight composite material, in particular a method for producing a lightweight composite material, as has been described above.
  • the composite material to be produced by the method according to the invention is intended to comprise a lightweight support material, a cover layer made of a fibrous or honeycomb material embedded in a resin material on at least one of the surfaces of the support material, and a resin-impermeable release layer disposed between the support material and the cover layer.
  • the release layer is first applied to the surface of the support material to be coated. Subsequently, the fiber or honeycomb material of the cover layer is applied to the release layer. The fiber or honeycomb material is then impregnated with a liquid resin, which is used to form the Curing layer on the release layer, wherein the formed on the fiber or honeycomb material, on the release layer and / or the carrier material flow channels and / or openings cause a uniform distribution of the resin.
  • the resulting arrangement of carrier material, separating layer and fiber material is used in a closed space in a particularly preferred embodiment variant.
  • the liquid resin is passed, which penetrates into the fiber material applied to the release layer.
  • the separating layer prevents the liquid resin from penetrating into the carrier material.
  • the liquid resin in order to accelerate the penetration of the liquid resin into the fiber material, it is proposed in a particularly preferred variant of the method according to the invention to introduce the liquid resin under pressure into the enclosed space.
  • the liquid resin can be conveyed into the closed space at a pressure in the range of about 0.2 to 8 bar.
  • the pressure may be higher if the mold withstands the delivery pressure.
  • the enclosed space is formed by a fixed shape from at least two molded parts whose inner contours correspond to the later outer contour of the finished component.
  • the arrangement of carrier material, release layer and fiber material is placed in the open mold, the mold is then closed and filled the liquid resin under pressure into the mold. After curing of the resin, the outer contour of the composite material corresponds to the shape predetermined by the mold. To harden the resin, the mold is heated at least in sections.
  • a negative pressure in the closed mold which preferably corresponds to an approximately 55 to 95 percent vacuum. Subsequently, the liquid resin is passed with a slight overpressure in the closed mold.
  • the enclosed space is formed by a film under which the arrangement is positioned.
  • the air in the enclosed space under the film in which the arrangement is located is then pumped off, so that under the film, a negative pressure is generated.
  • This preferably corresponds to an approximately 55 to 95 percent vacuum.
  • the resin is passed under ambient pressure under the film.
  • the separating layer does not adhere sufficiently to the surface of the carrier material, or if the separating layer is not provided with an additional adhesive layer, it is also proposed to apply an adhesive layer to the flat side of the carrier material prior to the application of the separating layer to which the separating layer is in turn applied.
  • the closed space is placed under reduced or elevated pressure.
  • a corresponding overpressure is generated in the mold, which is for example about 2 bar.
  • a vacuum film the negative pressure is maintained under the film over a predetermined period.
  • an adhesive layer 14 is applied to the two flat sides of a carrier material 12, in the present case a honeycomb structure saturated with phenolic resin, which is reinforced with aramid fibers, in particular Nomex® fibers.
  • the adhesive layer 14 is an epoxy resin adhesive layer, which is positioned by hand on the respective flat side of the carrier material 12. In the adhesive layer 14 openings (not shown) are formed at different locations whose function will be explained later.
  • a second process step which in Fig. 2 is shown, the two adhesive sheets 14 are heated briefly with a Schu Kunststofffön until the surface is tacky. Subsequently, a release layer 16 which has been surface-cleaned beforehand is applied to each adhesive layer 14 and bonded to the adhesive layer.
  • a polyester film is used in the present case.
  • a plurality of openings L are also formed, which are aligned with the openings formed on the adhesive layers 14 to form a flow opening.
  • a further adhesive layer 18 is applied to each of the two separating layers 16, which is for example an epoxy resin adhesive layer, which is placed by hand on the respective release layer 16, wherein in the adhesive layer openings (not shown) are formed, which are aligned with the openings L in the release layer 16. Subsequently, the adhesive layers 18 are heated as far with a Schubuchfön until their surfaces are sticky.
  • Fig. 4 the underside of a fibrous material 20 made of a polyester nonwoven fabric is shown.
  • the underside of the fiber material 20 is in this case provided with honeycomb to each other running flow channels F, which are formed in the bottom.
  • Fig. 5 shows a fourth method step, in which the fiber material 20 is placed on the two adhesive layers 18 and bonded to the adhesive layers 18.
  • a vacuum film 24 for example a silicone film or an elastomeric film, as in FIG Fig. 6 is shown, which is sealed at its edges by a peripheral seal 26 from the environment.
  • a reusable silicone film or a silicone cover can also be used.
  • a vacuum is generated under the vacuum film 24, which corresponds approximately to a 75 to 90 percent vacuum, as indicated by the arrow 28.
  • a liquid resin 32 for example an epoxy resin, is introduced under the vacuum film 24, as indicated by the arrow.
  • the liquid resin 32 penetrates into the fiber material 20 held on the two flat sides, flows along the flow channels F formed on the lower sides of the fiber material 20 (cf. Fig. 4 ) and impregnates the fiber material 20.
  • the flow channels F cause by their course a defined flow front of the resin 32 within the fiber material 20, wherein in particular the two separating layers 16 prevent the Resin 32 penetrates into the honeycomb structures of the substrate 12. Only at the locations of the separating layer at which the openings L are formed can the liquid resin 32 also penetrate into the honeycomb structure of the carrier material 12, which results in defined resin compounds in the carrier material 12 after curing.
  • vacuum is maintained below the vacuum film 24 at room temperature, corresponding to about 75 to 95 percent vacuum, which further accelerates the curing of the resin 32. This process is referred to as cold curing.
  • the assembly 22 after cold curing is subjected to two post-curing steps in which the assembly 22 is first heat treated in an oven for about 2 hours at about 80 ° C. Subsequently, the assembly 22 is through-hardened over a period of about 1 hour at about 120 ° C. It should be noted, however, that the duration of the post cure depends on the resin used.
  • the lightweight composite 10 is completed as shown in FIG Fig. 7 is shown, in which the fibrous material 20 embedded in the cured resin 32 forms, as a fiber composite material, in each case the cover layer 34, which is firmly connected to the carrier material 12 via the adhesive layer 18, the separating layer 16 and the adhesive layer 14.
  • Table 1 two embodiments, which were manufactured according to the method described above example support material first adhesive layer Interface second adhesive layer fiber material resin first example honeycomb epoxy resin PES film epoxy resin PES fleece (polyester) epoxy Nomex second example honeycomb epoxy resin PES film epoxy resin GF-scrim (fiberglass) epoxy Nomex
  • the previously described vacuum film 24 is used, under which a negative pressure is generated, which corresponds to an approximately 55 to 95 percent vacuum.
  • the liquid resin 32 is passed under the vacuum film 24, wherein the negative pressure acting in the closed space 30 under the vacuum film 24 draws the resin 32 into the fiber material 20.
  • a solid counter-mold is used, which is closed by means of a negative pressure corresponding to about 55 to 95 percent vacuum.
  • the liquid resin 32 is injected into the mold with a slight overpressure.
  • RTM process Resin Transfer Molding
  • high-quality composite materials can be produced that have a smooth visible surface on both sides.
  • the assembly 22 is placed between a rigid lower mold and a rigid upper mold and the two molds are closed.
  • liquid resin 32 is injected into the closed mold at a pressure of about 0.2 to 8 bar.
  • Table 2 below lists again the various process parameters which are set in the various processes for producing the composite material according to the invention.
  • Table 2 Process parameters for the different processes process parameters attitude Temperature during vacuum infusion from room temperature to about 140 ° C Temperature at the vacuum injection from room temperature to about 140 ° C Temperature in the RTM process from room temperature to about 140 ° C Pressure during vacuum infusion corresponds to about 55 to 95% vacuum Pressure during vacuum injection corresponds to about 55 to 95% vacuum Pressure in the RTM process about 0.2 to 8 bar Filling pressure of the resin in the vacuum infusion ambient pressure Filling pressure of the resin during the vacuum injection low overpressure Filling pressure of the resin in the RTM process about 0.2 to 8 bar Temperature for curing from room temperature to 200 ° C Pressure for curing during vacuum infusion corresponds to about 75 to 95% vacuum Pressure for curing during the vacuum injection corresponds to about 75 to 95% vacuum Pressure for curing in the RTM process about 1.5 to 2.0 bar
  • the separating layer 16 can optionally also be designed such that it can simultaneously serve both as a separating layer 16 and as an adhesive layer 14 to the carrier material 12 and as an adhesive layer 18 to the fiber material 20 ( see the fifth example).
  • the separating layer 16 may also be formed in the form of a thin metal foil.

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Claims (14)

  1. Matériau composite pour construction légère comprenant un matériau support pour construction légère (12) et une couche de revêtement (34) prévue sur au moins une surface du matériau support (12), une couche de séparation (16) imperméable à la résine étant prévue entre la surface du matériau support (12) et la couche de revêtement (34), et la couche de revêtement (34) étant formée à base d'un matériau fibreux ou d'un matériau en nid d'abeilles (20), qui est intégré dans un matériau de résine (32) durci sur la couche de séparation (16),
    caractérisé en ce que
    des canaux d'écoulement (F) et/ou des ouvertures (L) pour la répartition uniforme du matériau de résine (32) liquide avant le durcissement, sont réalisés dans le matériau support (12) et/ou dans la couche de séparation (16) et/ou dans le matériau fibreux ou le matériau en nid d'abeilles (20) de la couche de revêtement (34) à former.
  2. Matériau composite pour construction légère selon la revendication 1, caractérisé en ce que les canaux d'écoulement (F) sont réalisés sur au moins l'un des côtés plats du matériau fibreux ou du matériau en nid d'abeilles (20) ou sur le côté plat, tourné vers le matériau fibreux ou le matériau en nid d'abeilles (20), de la couche de séparation (16).
  3. Matériau composite pour construction légère selon la revendication 2, caractérisé en ce que les canaux d'écoulement (F) sont intégrés dans le(s) côté(s) plat(s) du matériau fibreux (20).
  4. Matériau composite pour construction légère selon la revendication 2, caractérisé en ce que les canaux d'écoulement (F) sont formés sur le côté plat ou les côtés plats du matériau en nid d'abeilles (20).
  5. Matériau composite pour construction légère selon au moins l'une quelconque des revendications 1 à 4,
    caractérisé en ce que les canaux d'écoulement (F) sont agencés dans une structure en nid d'abeilles.
  6. Matériau composite pour construction légère selon au moins l'une quelconque des revendications 1 à 5, caractérisé en ce que les ouvertures (L) sont réalisées dans la surface du matériau support (12) et/ou dans la couche de séparation (16) de préférence sous la forme de perçages de trou continus et agencés perpendiculairement à la surface.
  7. Matériau composite pour construction légère selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que le matériau support (12) est plan et la couche de séparation (16) et la couche de revêtement (34) sont prévues sur chacun de ses côtés plats.
  8. Matériau composite pour construction légère selon au moins l'une quelconque des revendications précédentes, caractérisé en ce qu'une première couche adhésive (14) est prévue entre la couche de séparation (16) et le matériau support (12).
  9. Matériau composite pour construction légère selon au moins l'une quelconque des revendications précédentes, caractérisé en ce qu'une seconde couche adhésive (12) est prévue entre la couche de séparation (16) et la couche de revêtement (34).
  10. Matériau composite pour construction légère selon au moins l'une quelconque des revendications précédentes, caractérisé en ce qu'un tissage, un tissu non-tissé, un treillis, un maillage, un tricotage, un non-tissé ou un matériau hybride sert de matériau fibreux (20) pour la couche de revêtement (34).
  11. Matériau composite pour construction légère selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que le matériau support (12) présente une structure en nid d'abeilles de préférence uniforme.
  12. Matériau composite pour construction légère selon la revendication 11, caractérisé en ce que le matériau support (12) est une structure en nid d'abeilles à base de métal, de préférence une structure en nid d'abeilles à base d'aluminium, ou une structure en nid d'abeilles à base de papier, carton ou plastique.
  13. Matériau composite pour construction légère selon au moins l'une quelconque des revendications précédentes 1 à 10, caractérisé en ce le matériau support (12) est un matériau alvéolaire de préférence à pores ouverts.
  14. Matériau composite pour construction légère selon au moins l'une quelconque des revendications précédentes 1 à 10, caractérisé en ce que le matériau support (12) est fabriqué à base de bois de balsa.
EP04024769A 2003-10-17 2004-10-18 Matériau léger et son procédé de fabrication Expired - Lifetime EP1524105B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10349136 2003-10-17
DE10349136 2003-10-17
DE10358295 2003-12-12
DE10358295A DE10358295B4 (de) 2003-10-17 2003-12-12 Leichtbau-Verbundmaterial sowie Verfahren zu dessen Herstellung

Publications (3)

Publication Number Publication Date
EP1524105A2 EP1524105A2 (fr) 2005-04-20
EP1524105A3 EP1524105A3 (fr) 2005-10-26
EP1524105B1 true EP1524105B1 (fr) 2009-12-09

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EP04024769A Expired - Lifetime EP1524105B1 (fr) 2003-10-17 2004-10-18 Matériau léger et son procédé de fabrication

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EP (1) EP1524105B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112423970A (zh) * 2018-07-10 2021-02-26 赛峰短舱公司 用于制造复合板的方法

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3235936A1 (fr) * 2016-04-19 2017-10-25 Maucher Formenbau GmbH & Co. KG Procede de fabrication d'une structure plate de fibres mixtes et structure plate
CN110625843A (zh) * 2018-06-25 2019-12-31 科思创德国股份有限公司 一种聚氨酯复合材料中夹芯材料的干燥方法
CN112519273B (zh) * 2020-11-03 2022-09-20 哈尔滨哈飞航空工业有限责任公司 一种铝面板蜂窝夹层结构超大面积脱粘的修理方法
CN112743880B (zh) * 2020-12-11 2022-08-09 哈尔滨飞机工业集团有限责任公司 一种蜂窝夹层结构件大面积损伤的修理方法
CN113858614B (zh) * 2021-09-28 2023-11-24 大连理工大学 连续纤维多层蜂窝夹层板及其一体化成形方法
DE102023115646A1 (de) 2023-06-15 2024-12-19 Jan Brügge Herstellung eines Formteiles aus verleimten Holzschichten

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000048830A1 (fr) * 1999-02-16 2000-08-24 Toray Industries, Inc. Structure en stratifie plastique renforce et sa methode de fabrication

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112423970A (zh) * 2018-07-10 2021-02-26 赛峰短舱公司 用于制造复合板的方法

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EP1524105A3 (fr) 2005-10-26
EP1524105A2 (fr) 2005-04-20

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